File: FindIconv.cmake

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#   Copyright (c) 2007 Fabien Chéreau <fabien.chereau@gmail.com>
#   Copyright (c) 2012 Timothy Reaves <treaves@silverfieldstech.com>
#   All rights reserved.
#   
#   Redistribution and use in source and binary forms, with or without
#   modification, are permitted provided that the following conditions are met:
#   
#   1. Redistributions of source code must retain the above copyright notice,
#   this list of conditions and the following disclaimer.
#   2. Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
#   3. Neither the name of the copyright holder nor the names of its
#   contributors may be used to endorse or promote products derived from this
#   software without specific prior written permission. 
#   
#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
#   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
#   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
#   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
#   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
#   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
#   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#   POSSIBILITY OF SUCH DAMAGE.

#   - Try to find Iconv
#   
#   Once done this will define:
#       ICONV_FOUND - system has Iconv 
#       ICONV_INCLUDE_DIR - the Iconv include directory 
#       ICONV_LIBRARIES - Link these to use Iconv 
#       ICONV_SECOND_ARGUMENT_IS_CONST - the second argument for iconv() is
#       const
#   
#    As of 7/27/2012 the version of libiconv.2.dyld in /usr/lib is incompatible
#    with libintl.8.dylib in /opt/local/lib HINTS are used before looking in
#    the usual places...


include(CheckCXXSourceCompiles)

IF (ICONV_INCLUDE_DIR AND ICONV_LIBRARIES)
  # Already in cache, be silent
  SET(ICONV_FIND_QUIETLY TRUE)
ENDIF (ICONV_INCLUDE_DIR AND ICONV_LIBRARIES)

IF(APPLE)
    FIND_PATH(ICONV_INCLUDE_DIR iconv.h 
        HINTS
        /opt/local/include
        /sw/include
    )
ELSE(NOT APPLE)
    FIND_PATH(ICONV_INCLUDE_DIR iconv.h)
ENDIF(APPLE)

IF(APPLE)
    FIND_LIBRARY(ICONV_LIBRARIES NAMES iconv
        HINTS
        /opt/local/lib
        /sw/include
    ) 
ELSE(NOT APPLE)
    FIND_LIBRARY(ICONV_LIBRARIES NAMES iconv c)
ENDIF(APPLE)

IF(ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) 
   SET(ICONV_FOUND TRUE) 
ENDIF(ICONV_INCLUDE_DIR AND ICONV_LIBRARIES) 

set(CMAKE_REQUIRED_INCLUDES ${ICONV_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARIES})
IF(ICONV_FOUND)
  check_cxx_source_compiles("
  #include <iconv.h>
  int main(){
    iconv_t conv = 0;
    const char* in = 0;
    size_t ilen = 0;
    char* out = 0;
    size_t olen = 0;
    iconv(conv, &in, &ilen, &out, &olen);
    return 0;
  }
" ICONV_SECOND_ARGUMENT_IS_CONST )
ENDIF(ICONV_FOUND)
set(CMAKE_REQUIRED_INCLUDES)
set(CMAKE_REQUIRED_LIBRARIES)

IF(ICONV_FOUND) 
  IF(NOT ICONV_FIND_QUIETLY) 
    MESSAGE(STATUS "Found Iconv: ${ICONV_LIBRARIES}") 
  ENDIF(NOT ICONV_FIND_QUIETLY) 
ELSE(ICONV_FOUND) 
  IF(Iconv_FIND_REQUIRED) 
    MESSAGE(FATAL_ERROR "Could not find Iconv") 
  ENDIF(Iconv_FIND_REQUIRED) 
ENDIF(ICONV_FOUND) 

MARK_AS_ADVANCED(
  ICONV_INCLUDE_DIR
  ICONV_LIBRARIES
  ICONV_SECOND_ARGUMENT_IS_CONST
)